A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
NSN 5990-01-493-4039
NSN 6620-00-876-0776
NSN 5930-01-005-0409
NSN 5895-01-592-7443
NSN 6220-01-347-8642
NSN 6320-01-624-0193
NSN 5905-00-283-3342
NSN 5915-01-574-6481
NSN 6110-01-140-4176
NSN 5998-00-397-6436
NSN 5990-01-586-5754
NSN 6610-01-102-2256